Products

Accuracy and Durability in the Field: YSI Pro20i Dissolved Oxygen Meter

With a rugged design, interchangeable sensors, and instant calibration, the YSI Pro20i is the ideal tool for reliable dissolved oxygen measurements in demanding conditions.

The YSI Pro20i is a portable meter for dissolved oxygen (DO) and temperature, designed to deliver accurate field measurements with a durable and easy-to-use interface. Unlike other models, the Pro20i features an integral (non-detachable) cable available in 1, 4, and 10 meter lengths. Users can choose between polarographic or galvanic DO sensors, both of which are user-replaceable, to meet various measurement needs. Its rubber over-molded housing, military-spec connectors, and backlit display make it ideal even in harsh environments.

Key Features

One-step calibration: One Touch Cal function allows calibration in under 3 seconds.

Integrated cable: Available in 1, 4, and 10-meter lengths, with interchangeable DO sensors.

Built for the field: Waterproof (IP-67), drop-tested from 1 meter, with a non-slip rubber casing.

Interchangeable sensors: Choice of polarographic (1-year warranty) or galvanic (6-month warranty) sensors.

Internal barometer: Ensures greater DO measurement accuracy.

Fast response: 95% response time in just 8 seconds with standard membrane.

Outdoor-readable display: Graphic backlit display and glow-in-the-dark keypad, readable even with polarized sunglasses.

Internal memory: Stores up to 50 data sets to ensure data integrity.

Multilingual interface: Available in English, Spanish, French, and German.

Long battery life: Up to 400 hours of operation with 2 C-cell batteries (without backlight).

Parameter	Detail
Cable	Integrated, available in 1, 4, and 10 meters
Compatible Sensors	Polarographic (1-year warranty) / Galvanic (6-month warranty)
Calibration	One Touch Cal (fast, in 3 seconds)
Memory	50 data sets
User Interface Language	English, Spanish, French, German
Display	Graphic, backlit, visible with polarized sunglasses
Power Supply	2 alkaline C-cell batteries (~400 h without backlight)
Certifications	RoHS, CE, WEEE, IP-67, 1-meter drop test
Response Time	95% in 8 seconds

YSI Pro20i with integrated cable
Dissolved oxygen sensor with membrane cap kit
User manual
2 C-cell batteries

Dissolved oxygen calibration solution (optional for best results)
Appropriate environmental conditions for field use

Additional galvanic or polarographic sensor
Membrane maintenance kit
Padded carrying case

Features
Calibration	400 detailed calibration records can be stored and are available for viewing, downloading and printing.
Certifications	CEC, CE; RoHS; IP-67; WEEE; FCC UN Part III, Section 38.3, Test Methods for Lithium-ion Batteries (Class 9)
Data Management	100 user-defined sites and 100 user-defined data ID tags; site images can be sent to the handheld computer via KorDSS
Monitor	Color, graphic LCD display; 1.5'' wide x 2.5'' high
Idioms	English, Spanish, German, French, Italian, Norwegian, Norwegian, Portuguese, Japanese, Chinese (simplified and traditional), Korean, Thai.
Registration Capabilities	Single or continuous point with auto-steady-state function
Memory	> 100,000 data sets
Operating Temperature	0 to 50 ° C (32 to 122 ° F)
Power	Rechargeable lithium-ion battery provides ~ 48 hours with meter alone, battery recharge time is ~ 9 hours with AC power adapter; instrument can also be powered via AC or external power supply through USB port
Dimensions	32.6'' x 85.0'' x 22.0''
Storage Temperature	0 to 45 ° C (32 to 113 ° F) with battery installed; 0 to 60 ° C (32 to 140 ° F) without battery installed
USB	Built-in On-The-Go micro USB port for PC connection, handheld computer recharging / powering and direct connection to a USB flash drive
weight	567 grams with battery

Features

Calibration

400 detailed calibration records can be stored and are available for viewing, downloading and printing.

Certifications

CEC, CE; RoHS; IP-67; WEEE; FCC UN Part III, Section 38.3, Test Methods for Lithium-ion Batteries (Class 9)

Data Management

100 user-defined sites and 100 user-defined data ID tags; site images can be sent to the handheld computer via KorDSS

Monitor

Color, graphic LCD display; 1.5'' wide x 2.5'' high

Idioms

English, Spanish, German, French, Italian, Norwegian, Norwegian, Portuguese, Japanese, Chinese (simplified and traditional), Korean, Thai.

Registration Capabilities

Single or continuous point with auto-steady-state function

Memory

> 100,000 data sets

Operating Temperature

0 to 50 ° C (32 to 122 ° F)

Power

Rechargeable lithium-ion battery provides ~ 48 hours with meter alone, battery recharge time is ~ 9 hours with AC power adapter; instrument can also be powered via AC or external power supply through USB port

Dimensions

32.6'' x 85.0'' x 22.0''

Storage Temperature

0 to 45 ° C (32 to 113 ° F) with battery installed; 0 to 60 ° C (32 to 140 ° F) without battery installed

USB

Built-in On-The-Go micro USB port for PC connection, handheld computer recharging / powering and direct connection to a USB flash drive

weight

567 grams with battery

Yuasa NP12-12 Sealed Battery (12V 12Ah) – Reliable Power for Industrial Use

Maximum safety and performance with gas recombination technology. Ideal for demanding industrial applications and backup systems.

The Yuasa NP12-12 is a 12V 12Ah VRLA (sealed lead-acid) battery designed to provide reliable, long-lasting performance in industrial applications. With over 80 years of experience, Yuasa has perfected oxygen recombination technology that minimizes maintenance and enhances operational safety. This battery supports both float and cyclic use, allowing for flexible installation in multiple positions (except continuously inverted). Its robust construction and suspended electrolyte system ensure a long service life, with a Eurobat classification of up to 5 years.

Key Features:

Gas recombination: Technology that minimizes gas release, eliminating the need for regular maintenance.

Sealed design: Hermetically sealed construction prevents electrolyte leakage, even in various mounting positions.

Excellent recovery from deep discharge: Ideal for applications where power outages are frequent.

Lead-calcium grids: Provide longer service life compared to standard batteries.

Suspended electrolyte system: Uses fiberglass mat to eliminate the need for gels or other contaminants.

Designed for float or cyclic use: Suitable for a wide range of industrial and backup applications.

Eurobat classification: Estimated service life of 3 to 5 years under standard use.

Global manufacturing: Quality supported by international standards.

Specification	Value
Nominal Voltage	12 V
Capacity (20 hours)	12 Ah
Eurobat Classification	3 to 5 years (standard use)
Type	VRLA (Sealed Lead-Acid)
Installation Orientation	Up to 90° from vertical (not continuously inverted)
Recombination Technology	Yes
Electrolyte System	Absorbent Glass Mat (AGM)
Application	Float or cyclic